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Carroll & Lange ° <br /> 165 South Union Blvd., Suite 156 <br />\/ Lakewood, Colorado 80228 <br /> 303/980-0200 Job. No. <br /> Fax: 303/980-0917 <br /> Date <br />PROJECT St. Vrain Lakes Sheet <br />SUbjeCt Temporary Sediment Basin By <br />3075 <br />06/08/06 <br />3of4 <br />MMU <br />Sediment Pond 7 <br />Tributary <br />Disturbed Area = 22.4 acres <br />Undisturbed Area = 0 acres <br />Temporary Sediment Basin =Disturbed Area x 1800 ft'/acre + Undisturbed Area x 900ft3/acre <br />Temporary Sediment Basin = 40320 ft3 <br />= 0.9256 ac-ft <br />Volume Provided = 1.23 ac-ft (Sedimentation Pond 7 <br />= 53576.8 ft' <br />Sediment Pond 8 <br />Tributary <br />Disturbed Area = 17.7 acres <br />Undisturbed Area = 0 acres <br />Temporary Sediment Basin =Disturbed Area x 1800 ft3/acre + Undisturbed Area x 900ft3/acre <br />Temporary Sediment Basin = 31860 ft' <br />= 0.7314 ac-ft <br />Volume Provided = 0.71 ac-ft (Sedimentation Pond 8 <br />= 30927.6 ft3 <br />Sediment Pond 9 <br />Tributary <br />Disturbed Area = 28 acres <br />Undisturbed Area = 0 acres <br />Temporary Sediment Basin =Dis turbed Area x 1800 ft'/acre + Undisturbed Area x 900ft'/acre <br />Temporary Sediment Basin = 50400 ft3 <br />= 1.1570 ac-ft <br />Volume Provided = 1.2 ac-ft (Sedimentation Pond 9 <br />= 52272 ft' <br />Sediment Basin.xls <br />